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Re: [Xen-devel] A couple of questions about Xen
- To: Eric Benton <benton71@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
- From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
- Date: Thu, 26 Oct 2006 19:08:58 +0100
- Delivery-date: Thu, 26 Oct 2006 11:20:36 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
- Thread-index: Acb5Kc5+DTXWAGUdEduoQgANk04WTA==
- Thread-topic: [Xen-devel] A couple of questions about Xen
On 26/10/06 6:27 pm, "Eric Benton" <benton71@xxxxxxxxx> wrote:
1. Is it possible to share contiguous memory regions between a hvm domain and dom0 using the grant tables?
2. Why do we need the piix bridge in the ioemu? is it being used at all?
- Yes. The PV-on-HVM drivers do this (from HVM to dom0). Other way (dom0 pages mapped in HVM) will not work as yet.
- It’s used for PCI-ISA IRQ routing. I wondered about removing it but I think I’ve changed my mind for the time being. If you boot an HVM guest in APIC mode, it will not have the ‘4 IRQ routers’ limitation.
-- Keir
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